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vga16fb: source code improvement 

Use constants and functions from the vga.h file.  Also add module
description.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Helt 2008-07-23 21:31:23 -07:00 committed by Linus Torvalds
parent ea9014bcac
commit 98219374d9
1 changed files with 39 additions and 78 deletions
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117
drivers/video/vga16fb.c
View File

@ -26,18 +26,6 @@
#include <asm/io.h>
#include <video/vga.h>
#define GRAPHICS_ADDR_REG VGA_GFX_I /* Graphics address register. */
#define GRAPHICS_DATA_REG VGA_GFX_D /* Graphics data register. */
#define SET_RESET_INDEX VGA_GFX_SR_VALUE /* Set/Reset Register index. */
#define ENABLE_SET_RESET_INDEX VGA_GFX_SR_ENABLE /* Enable Set/Reset Register index. */
#define DATA_ROTATE_INDEX VGA_GFX_DATA_ROTATE /* Data Rotate Register index. */
#define GRAPHICS_MODE_INDEX VGA_GFX_MODE /* Graphics Mode Register index. */
#define BIT_MASK_INDEX VGA_GFX_BIT_MASK /* Bit Mask Register index. */
#define dac_reg (VGA_PEL_IW)
#define dac_val (VGA_PEL_D)
#define VGA_FB_PHYS 0xA0000
#define VGA_FB_PHYS_LEN 65536
@ -108,7 +96,7 @@ static struct fb_fix_screeninfo vga16fb_fix __initdata = {
.visual = FB_VISUAL_PSEUDOCOLOR,
.xpanstep = 8,
.ypanstep = 1,
.line_length = 640/8,
.line_length = 640 / 8,
.accel = FB_ACCEL_NONE
};
@ -135,23 +123,22 @@ static inline int setmode(int mode)
{
int oldmode;
vga_io_w(GRAPHICS_ADDR_REG, GRAPHICS_MODE_INDEX);
oldmode = vga_io_r(GRAPHICS_DATA_REG);
vga_io_w(GRAPHICS_DATA_REG, mode);
oldmode = vga_io_rgfx(VGA_GFX_MODE);
vga_io_w(VGA_GFX_D, mode);
return oldmode;
}
/* Select the Bit Mask Register and return its value. */
static inline int selectmask(void)
{
return vga_io_rgfx(BIT_MASK_INDEX);
return vga_io_rgfx(VGA_GFX_BIT_MASK);
}
/* Set the value of the Bit Mask Register. It must already have been
selected with selectmask(). */
static inline void setmask(int mask)
{
vga_io_w(GRAPHICS_DATA_REG, mask);
vga_io_w(VGA_GFX_D, mask);
}
/* Set the Data Rotate Register and return its old value.
@ -161,9 +148,8 @@ static inline int setop(int op)
{
int oldop;
vga_io_w(GRAPHICS_ADDR_REG, DATA_ROTATE_INDEX);
oldop = vga_io_r(GRAPHICS_DATA_REG);
vga_io_w(GRAPHICS_DATA_REG, op);
oldop = vga_io_rgfx(VGA_GFX_DATA_ROTATE);
vga_io_w(VGA_GFX_D, op);
return oldop;
}
@ -173,9 +159,8 @@ static inline int setsr(int sr)
{
int oldsr;
vga_io_w(GRAPHICS_ADDR_REG, ENABLE_SET_RESET_INDEX);
oldsr = vga_io_r(GRAPHICS_DATA_REG);
vga_io_w(GRAPHICS_DATA_REG, sr);
oldsr = vga_io_rgfx(VGA_GFX_SR_ENABLE);
vga_io_w(VGA_GFX_D, sr);
return oldsr;
}
@ -184,22 +169,21 @@ static inline int setcolor(int color)
{
int oldcolor;
vga_io_w(GRAPHICS_ADDR_REG, SET_RESET_INDEX);
oldcolor = vga_io_r(GRAPHICS_DATA_REG);
vga_io_w(GRAPHICS_DATA_REG, color);
oldcolor = vga_io_rgfx(VGA_GFX_SR_VALUE);
vga_io_w(VGA_GFX_D, color);
return oldcolor;
}
/* Return the value in the Graphics Address Register. */
static inline int getindex(void)
{
return vga_io_r(GRAPHICS_ADDR_REG);
return vga_io_r(VGA_GFX_I);
}
/* Set the value in the Graphics Address Register. */
static inline void setindex(int index)
{
vga_io_w(GRAPHICS_ADDR_REG, index);
vga_io_w(VGA_GFX_I, index);
}
static void vga16fb_pan_var(struct fb_info *info,
@ -672,10 +656,10 @@ static void ega16_setpalette(int regno, unsigned red, unsigned green, unsigned b
static void vga16_setpalette(int regno, unsigned red, unsigned green, unsigned blue)
{
outb(regno, dac_reg);
outb(red >> 10, dac_val);
outb(green >> 10, dac_val);
outb(blue >> 10, dac_val);
outb(regno, VGA_PEL_IW);
outb(red >> 10, VGA_PEL_D);
outb(green >> 10, VGA_PEL_D);
outb(blue >> 10, VGA_PEL_D);
}
static int vga16fb_setcolreg(unsigned regno, unsigned red, unsigned green,
@ -719,28 +703,15 @@ static int vga16fb_pan_display(struct fb_var_screeninfo *var,
blanking code was originally by Huang shi chao, and modified by
Christoph Rimek (chrimek@toppoint.de) and todd j. derr
(tjd@barefoot.org) for Linux. */
#define attrib_port VGA_ATC_IW
#define seq_port_reg VGA_SEQ_I
#define seq_port_val VGA_SEQ_D
#define gr_port_reg VGA_GFX_I
#define gr_port_val VGA_GFX_D
#define video_misc_rd VGA_MIS_R
#define video_misc_wr VGA_MIS_W
#define vga_video_port_reg VGA_CRT_IC
#define vga_video_port_val VGA_CRT_DC
static void vga_vesa_blank(struct vga16fb_par *par, int mode)
{
unsigned char SeqCtrlIndex;
unsigned char CrtCtrlIndex;
unsigned char SeqCtrlIndex = vga_io_r(VGA_SEQ_I);
unsigned char CrtCtrlIndex = vga_io_r(VGA_CRT_IC);
//cli();
SeqCtrlIndex = vga_io_r(seq_port_reg);
CrtCtrlIndex = vga_io_r(vga_video_port_reg);
/* save original values of VGA controller registers */
if(!par->vesa_blanked) {
par->vga_state.CrtMiscIO = vga_io_r(video_misc_rd);
par->vga_state.CrtMiscIO = vga_io_r(VGA_MIS_R);
//sti();
par->vga_state.HorizontalTotal = vga_io_rcrt(0x00); /* HorizontalTotal */
@ -756,12 +727,11 @@ static void vga_vesa_blank(struct vga16fb_par *par, int mode)
/* assure that video is enabled */
/* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */
//cli();
vga_io_wseq(0x01, par->vga_state.ClockingMode | 0x20);
/* test for vertical retrace in process.... */
if ((par->vga_state.CrtMiscIO & 0x80) == 0x80)
vga_io_w(video_misc_wr, par->vga_state.CrtMiscIO & 0xef);
vga_io_w(VGA_MIS_W, par->vga_state.CrtMiscIO & 0xef);
/*
* Set <End of vertical retrace> to minimum (0) and
@ -769,12 +739,10 @@ static void vga_vesa_blank(struct vga16fb_par *par, int mode)
* Result: turn off vertical sync (VSync) pulse.
*/
if (mode & FB_BLANK_VSYNC_SUSPEND) {
outb_p(0x10,vga_video_port_reg); /* StartVertRetrace */
outb_p(0xff,vga_video_port_val); /* maximum value */
outb_p(0x11,vga_video_port_reg); /* EndVertRetrace */
outb_p(0x40,vga_video_port_val); /* minimum (bits 0..3) */
outb_p(0x07,vga_video_port_reg); /* Overflow */
outb_p(par->vga_state.Overflow | 0x84,vga_video_port_val); /* bits 9,10 of vert. retrace */
vga_io_wcrt(VGA_CRTC_V_SYNC_START, 0xff);
vga_io_wcrt(VGA_CRTC_V_SYNC_END, 0x40);
/* bits 9,10 of vert. retrace */
vga_io_wcrt(VGA_CRTC_OVERFLOW, par->vga_state.Overflow | 0x84);
}
if (mode & FB_BLANK_HSYNC_SUSPEND) {
@ -783,29 +751,22 @@ static void vga_vesa_blank(struct vga16fb_par *par, int mode)
* <Start of horizontal Retrace> to maximum
* Result: turn off horizontal sync (HSync) pulse.
*/
outb_p(0x04,vga_video_port_reg); /* StartHorizRetrace */
outb_p(0xff,vga_video_port_val); /* maximum */
outb_p(0x05,vga_video_port_reg); /* EndHorizRetrace */
outb_p(0x00,vga_video_port_val); /* minimum (0) */
vga_io_wcrt(VGA_CRTC_H_SYNC_START, 0xff);
vga_io_wcrt(VGA_CRTC_H_SYNC_END, 0x00);
}
/* restore both index registers */
outb_p(SeqCtrlIndex,seq_port_reg);
outb_p(CrtCtrlIndex,vga_video_port_reg);
//sti();
outb_p(SeqCtrlIndex, VGA_SEQ_I);
outb_p(CrtCtrlIndex, VGA_CRT_IC);
}
static void vga_vesa_unblank(struct vga16fb_par *par)
{
unsigned char SeqCtrlIndex;
unsigned char CrtCtrlIndex;
unsigned char SeqCtrlIndex = vga_io_r(VGA_SEQ_I);
unsigned char CrtCtrlIndex = vga_io_r(VGA_CRT_IC);
//cli();
SeqCtrlIndex = vga_io_r(seq_port_reg);
CrtCtrlIndex = vga_io_r(vga_video_port_reg);
/* restore original values of VGA controller registers */
vga_io_w(video_misc_wr, par->vga_state.CrtMiscIO);
vga_io_w(VGA_MIS_W, par->vga_state.CrtMiscIO);
/* HorizontalTotal */
vga_io_wcrt(0x00, par->vga_state.HorizontalTotal);
@ -827,9 +788,8 @@ static void vga_vesa_unblank(struct vga16fb_par *par)
vga_io_wseq(0x01, par->vga_state.ClockingMode);
/* restore index/control registers */
vga_io_w(seq_port_reg, SeqCtrlIndex);
vga_io_w(vga_video_port_reg, CrtCtrlIndex);
//sti();
vga_io_w(VGA_SEQ_I, SeqCtrlIndex);
vga_io_w(VGA_CRT_IC, CrtCtrlIndex);
}
static void vga_pal_blank(void)
@ -837,10 +797,10 @@ static void vga_pal_blank(void)
int i;
for (i=0; i<16; i++) {
outb_p (i, dac_reg) ;
outb_p (0, dac_val) ;
outb_p (0, dac_val) ;
outb_p (0, dac_val) ;
outb_p(i, VGA_PEL_IW);
outb_p(0, VGA_PEL_D);
outb_p(0, VGA_PEL_D);
outb_p(0, VGA_PEL_D);
}
}
@ -1485,6 +1445,7 @@ static void __exit vga16fb_exit(void)
platform_driver_unregister(&vga16fb_driver);
}
MODULE_DESCRIPTION("Legacy VGA framebuffer device driver");
MODULE_LICENSE("GPL");
module_init(vga16fb_init);
module_exit(vga16fb_exit);